Kill time
Definition 1 of 1
Pro Tip 1/3Colloquial Use
The phrase 'kill time' is informal and best suited for casual conversations, not formal situations. 
I'm going to kill time at the mall before meeting you for dinner.
Pro Tip 2/3Neutral Tone
'Kill time' doesn't imply that the activity is fun or boring; it's neutral and depends on context. 
She killed time by reading a book on the train.
Pro Tip 3/3No Urgency
Using 'kill time' suggests you're in no rush and are simply filling the gap between activities. 
He killed some time wandering around the store.